People should note that although Menlo Park may change zoning to allow for higher density housing, it can not override any CC&Rs on the property. For example, while the city will allow secondary housing units on single-family lots, the CC&R for Oakville Terrace (the area between Santa Cruz Ave, Middle Rd, San Mateo Dr and Wallea St) specifically allows only a single residential unit. Anyone putting in a secondary unit can be sued by any other lot owner in the subdivision.